Steam boiler



Sept. 6,'19272 L. GLASHOW.

STEAM BOILER Filed Sept. 24. 1925 2 Sheets-Sheet 1 oooooooooooo-ooooooooo BY WM? W ATTORNEY 2 Sheets-Sheet 2 l VENTOR il :azi el.

L. GLAsHow STEAM BOILER Filed sept. 24. 1925 Patented Sepitn, 1927.

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' 'STEAM BLER.

` 'e f Applicatinnled septenber s4; 19.25.' seriaine.Y 58,231.

The'present invention relates to steam boilers and has for rits objectto provide means for improving the eiiiciency and the durabilitythereof.

Another Objectis .to so constructrsaid kmeans that the same can beeasily and conveniently installed in an existingold type boiler in whichthe lire box is madey of bricks, without changing the generalconstruction of the boiler'and fire box thereof.

The old style boilers having` brick fire boxes are still in general use.These, however, havebeen found to be objectionable for the reason thatthe brick walls and arch of the fire box absorb a considerable amount ofheat and the fire box quickly burns out,`

requiring frequent` repairs.

To remedy these evils under ordinary circumstances would require thediscarding of y the old boiler and the installation of a new typo boilerhaving an all steel fire box., which, of course, would bey veryexpensive. I have found, however, that with comparatively small expenseitis possible to save the old boiler and render it very eiiicientandfdurable by simply removing` the brick side walls and arch andsubstituting therefor a water jacket and connecting the latter to theboiler tubes and steam system, so that there is a continuous watercirculation through said jacket. Thereby will the fire box, owing t0 thewater cooling, not only be rendered veryk durable, but the production ofsteam greatly accelerated.

My invention will be understood by reference to the accompanying drawingin which similar reference characters denote `corresponding parts and inwhich Fig. 1 is a longitudinal section of the boiler; Fig. 2 a

In the old structure the side walls andV arch piece of the fire box areformed by bricks, which, as has been heretofore stated, absorb a greatdeal of the heat necessary for the production of steam and quickly burnout. My invention consists in the provision of a metal fire boxstructure, which can be conveniently and cheaply installed into thespaceleft vacant, after the removal of said bricks, without making anymaterial changes inthe general construction of the broiler` and wherebythe aforenamed objections will be obviated. The new iire box structure10 in plan view is substantiallyl e5-shaped,` the longitudinal parts 1lthereof serving as in-` ner yside walls of the fire box and the crosspiece 12 as the front arch and both said parts being made of tightlyclosed casings to form water jackets. The longitudinal jackets 11 arepreferably each composed of two or more sections of `substantiallyrectangular crossscction. The cross piece 12 is a single hollow bodyhaving a central arched recess 13 at the bottom to serve as the openingleading into the fire box and to be closed as usual bydoors. Thisopening, as with that of the brick arches, has its Vside walls 14 and,"upper wall 15 arched, by making its side lwalls and top slanting-as bestshown in per-V spective inkFig. 5. The sections of the'side jackets 11are made to communicate with one another and with the end parts of thecross piece 12 by suitablemeans, as, for instance, hollow pushnippleslt, and are joined together by screw bolts, as at 17.

It will be seen that by my invention a boiler -lf of the old type in usein apartment houses orthe like can be saved with comparativelyv smallexpense.

To increase the heating capacity of vthe y jackets, the'innersurfaces-of the side parts are corrugated, as at 19.

As a safet means, I provide a fusible plug 20 in tie upper end of theslanting wall l5, so that when there is n'o water in the boiler the fusewill burn out and this will indicate to the `attendant that the boilermust be filled.

The side parts of the jackets may have brass plugs 21 for cleaningpurposes.

Vhat I claim is 1. As an article of manufacture, a metal fire boxadaptedfor installation in an old steamboiler in lieu of the brick fireboxthereof, said metal iirebox consisting of a hollow front jacket having arecess at its bottom whose top and side Walls are slant- `ing inwardlyto form an arch, and two lnol low ciclo jackets separably connected tosaid front aclet and each composed of separable e sectionscommunicaftingr with one another and with said front jacket, and asystem of pipes 'for connecting said irebox to he water space ofsaiclsteam boiler.

2. As an article of manufacture, a metal "-l lire box for installationin an old steam boiler in lieu of the brick fire box thereof, said metalfire box consisting of a front hollow Water jacket 'formed to an archand hollow siecle Water jackets separably connected to the inner ends ofsaid front Water jacket and each composed of separable scc tionscommunicating with one another and with said front Water jacket.

In testimony whereof I aix my signatur@- LEWIS GLASHOV.

